gavin



(No Model.) 2 Sheets-Sheet 1.

S. J. GAVIN.

FURNACE GRATB.

No. 388,273. Patented Aug. 21,1888.

(No Model.) 2 Sheets-Sheet 2.

S. J. GAVIN.

FURNACE GRATE.

No. 888,273. Patented Aug. 21, 1888.

STEPHEN J. GAVIN, OF PHILADELPHlA, PENNSYLVANIA, ASSIGNOR TO STEPHEN MORRIS AND EDWARD XV. MORRIS, BOTH OF SAME PLACE.

FURNACE-GRATE.

SPECIFICATION forming part of Letters Patent No. 388,273, dated August 21, 1888. Application filed September 23, 1886. Serial No.2l4,530. (No model.)

To aZZ whom, it 77mg concern.-

Be it known that l, STEPHEN J. GAVIN, a cltizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Furnaoe-Grates,0f which the following is a specification.

My invention consists of certain improvements in the shak i ng and du m ping grate shown in the patent ofL. Passmore, No. 809,979,dated December 30, 1884, the object ofmyinvention being to providesuch agrate with simple mechanlsm whereby the grate may be readily vibrated withoutdanger of accidental dumping, theparts bei ng so constructed, however,that by simple manipulation the dumping of the grate will be permitted, one lever serving to effect both the vibrating and dumping operations.

In the accompanying drawings, Figure 1 is a plan view, partly in section, of a portion of the baseplate ofa furnace with a grate-frame mounted thereon, and vibrating and dumping devices in accordance with my invention, part of the base-plate being broken away in order to show these devices. Fig. 2 is a view,partly in elevation and partly in section, on the line 1 2, Fig. 1; Fig. 3, a perspective view ofthe grateframe and the shaking and dumping devices therefor, part of the fixed frame of the furnace being also shown; Fig. 4, a view similar to Fig. 3, but showing some of the parts in a dif ferent position; and Fig. 5 a View showing the parts in still another position.

A represents part of the front plate, and B the base-plate, of a stove or furnace, D being the grate-frame, which is pivoted by means of a central pin, 2', to a transverse hanger-bar, 0, having at its opposite ends trunnions c,adapted to hearings in lugs 12 on the under side of the base-plate B.

Projecting from the grate-frame is a bar, d, between collars d, at the outer end of which is confined a link, 0, eyes on which receive a vertical pin, e, which passes through an opening at the inner end of a rod, E, the outer portion of which projects through a slot, at, in the front plate, A, the outer end of the rod being shaped so as to form a handle, f.

To the under side of the hanger-bar O is secured a bent arm, F, which projects beyond the trunnion of said bar, and is connected to the inner end of a rod, G, the outer end of which projects through a slot, 12, in the front plate, A, and is connected by a pin, 9, to the forked lower end of a lever, H. A pin, h, passes through openings in the forked portion of this lever H, and through a slot in the rod E, so that said rod is connected to the lever, but can have a certain amount ofvertical movement independent thereof.

Alug, a, projects from the grate-frame D, and has a bearing upon a segmental plate, a, secured to the under side of the bascplate B of the furnace, this lug and plate serving, un der ordinary circumstances, to prevent any tilting movement of the grate.

The shaking or vibrating movement of the grate is imparted thereto from the lever [I through the medium of the connectingrod E; but the latter has a lug, f, which, by contact with the front plate of the furnace, prevents the grate from being turned so far in the direction of the arrow, Fig. 1, as to free the lug from the retaining-plate a; but by lifting the outer end of the rod E to an extent permitted by the slot in the same the lug f will pass through the slot at in the front plate, A, so as to permit such a movement of the grate on its pivot as will free the lug a from the control of the plate a and permit the grate to be dumped, the lugf bearing against the outer face of the plate a and preventing any inward movement of the rod E, (see Fig. 4,) so that the pin h serves as a fulcrum, the movement of the lower arm ofthe lever being transmitted to the crankbar F of the grate through the medium of the connecting-rod G. (See Fig. 5.) After the grate has been dumped and restored to its horizontal position, the rod E is again lifted and the lugf passed to the inside of the plate A, so as to again bring the lug a of the grateframe under the influence of the retainingplate a.

Instead of slotting the rod E the lever H may be lifted bodily, so as to raise the outer ends of both connecting-rods to an extent sufficient to permit the lugf to pass through the slot m of the front plate, the slotting of the rod E being preferred, however, asa more convenient method of effecting this result. A link, 6, having a pivot-pin, 0', at right angles to the arm (1, provides a universal-joint connection between said arm and the inner end of the rod E, so as to permit either the shaking or the dunping of the grate without straining said ro The grate-frame D is provided with detachable grate-bar sections E, one of which is shown in Fig. 3, although my invention is not limited to this construction, as any desired form of grate may be used.

In the grate shown in the Passmore patent, before alluded to, the shaker-rod was jointed about midway of its length in order to permit the grate to tilt, and it was necessary to detach the outer end of the rod from the lever in order to tilt the grate, so that the lever could not be used as a means of efiecting the. tilting. These objections are effectually overcome by my invention.

I claim as my invention- 1. The combination of the pivoted hangerbar, the grateframe pivoted thereto, and a retainerto prevent the dumping of the grate, with ashaker-rod connected to said grate-frame and projecting through an opening in the front plate or casing of the furnace, said rod having a stop'lug whereby movement of the rod is arrested before the grate has been vibrated to such an extent as to free it from the control of the retainer which prevents the dumping of the grate, all substantially as specified.

2. The combination of the pivoted hanger- I bar and its crank, a grate pivoted to said bar, a retainer for preventing the dumping of the grate, a shaker-rod connected to the grateframe and having a stop-lug to restrict its movement, a dumping-lever, and a rod connecting said lever to the crank of the hangerbar, all substantially as specified.

3. The combination of the pivoted hangerbar and its crank, a grate pivoted to said bar, a retainer to prevent the dumping of the grate, a shaker-rod, E, connected to said grate and serving as a means of vibrating the same, a stop to limit the movement of said rod, a rod, G, connected to the crank of the hanger-bar,

and a lever connected to both of said rods E STEPHEN J. GAVIN.

Witnesses:

WM. K. SrIRYooK, -W. E. HOFFMAN. 

